Symfony/Doctrine - Twig_Error_Runtime: Catchable Fatal Error: Object of class Doctrine\ORM\PersistentCollection could not be converted to string

Question

I have this entity in my symfony project:

/**
 * Batiments
 *
 * @ORM\Table(name="batiments")
 * @ORM\Entity
 * @ORM\Entity(repositoryClass="MySpace\DatabaseBundle\Repository\BatimentsRepository")
 */
class Batiments
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

/**
     * @var string
     *
     * @ORM\Column(name="nom", type="string", length=150, nullable=true)
     */
    private $nom;

    /**
     * @ORM\ManyToOne(targetEntity="MySpace\DatabaseBundle\Entity\Ensembles")
     * @ORM\JoinColumn(nullable=false)
     */
    private $ensembles;

    /**
 * @ORM\ManyToMany(targetEntity="MySpace\DatabaseBundle\Entity\Typesactivite")
 * @ORM\JoinTable(name="batiments_typesactivite",
 *      joinColumns={@ORM\JoinColumn(name="batiments_id", referencedColumnName="id", nullable=false)},
 *      inverseJoinColumns={@ORM\JoinColumn(name="typesactivite_id", referencedColumnName="id", nullable=false)}
 *      )
 */
private $typesactivite;

//getters and setters

As you can see, I have a relation ManyToOne for the $ensembles and a ManyToMany relation for $typesactivite.

I have this SQL request:

SELECT b.referenceBatiment, b.nom, e.nom, p.nom, b.surfaceChauffee, ta.type
FROM `batiments` b, `ensembles` e, `parcsimmobilier` p, `typesactivite` ta, `batiments_typesactivite` bta
WHERE b.ensembles_id = e.id
AND e.parcsimmobilier_id = p.id
AND b.id = bta.batiments_id
AND ta.id = bta.typesactivite_id
GROUP BY p.nom, e.nom, b.nom, ta.type

On PhpMyAdmin the SQL request works very well, and so I have to import my SQl request in my Symfony Project (DQL with Doctrine).

I try this in my controller.php:

$query=$em->createQuery('SELECT b
                         FROM MySpaceDatabaseBundle:Ensembles e,  MySpaceDatabaseBundle:Typesactivite ta, MySpaceDatabaseBundle:Parcsimmobilier p, MySpaceDatabaseBundle:Batiments b
                         WHERE b.ensembles = e.id
                         AND b.typesactivite = ta.id');

It seems to work but just for the ManyToOne relation. I display the result in a <table> tag in html.twig like this:

<table id="dataTablesBatiments" class="table table-bordered table-hover" cellspacing="0" width="100%">
                <thead>
                  <tr>
                    <th>Référence</th>
                    <th>Parc</th>
                    <th>Nom</th>
                    <th>Ensemble</th>
                    <th>Type d'activité</th>
                    <th>Surface</th>
                    <th></th>
                  </tr>
                </thead>
                <tbody>
                  {% for batiments in batiment %}
                    <tr>
                      <td>{{ batiments.referencebatiment }}</td>
                      <td>{{ batiments.ensembles.parcsimmobilier }}</td>
                      <td>{{ batiments.nom }}</td>
                      <td>{{ batiments.ensembles }}</td>
                      <td>{{ batiments.typesactivite }}</td>
                      <td>{{ batiments.surfacechauffee }}</td>
                      <td><a href=""><button class="btn btn-warning btn-xs">Modifier</button></a></td>
                    </tr>
                  {% endfor %}
              </tbody>
            </table>

but I have this error:

[Semantical Error] line 0, col 328 near 'typesactivite': Error: Invalid PathExpression. StateFieldPathExpression or SingleValuedAssociationField expected.

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LAST UPDATE

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With all the suggestion I try to do this according to doctrine reference documentation and Symfonybook. Here's the code in my controller after removing the query request:

$em=$this->getDoctrine()->getManager();
        $batiment = $em->getRepository('MySpaceDatabaseBundle:Batiments')->findAll();

        return $this->render('MySpaceGestionPatrimoinesBundle:Batiments:indexBatiments.html.twig', array('batiment' => $batiment ));
}

But this error occured now:

An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Object of class Doctrine\ORM\PersistentCollection could not be converted to string in C:\wamp\www.........\app\cache\dev\twig\bf\66\146a31a62bf6f2a549d2604fb5be9c4530ab760a10169af08e8a5b72e9ee.php line 127") in MySpaceGestionPatrimoinesBundle:Batiments:indexBatiments.html.twig at line 60.

Like you can see, in my twig, all is right. Someone?

Thank you for the help.

Answer 1

It seems like I found the solution thanks to another developper (thank you again by the way).

Look at here: in fact you have to make a loop in your twig.

For it should be something like this in your code:

<tbody>
       {% for batiments in batiment %}
         <tr>
           <td>{{ batiments.referencebatiment }}</td>
           <td>{{ ... }}</td>
           <!-- your loop here -->
           <td>
             {% for batiments in batiments.typesactivite %}
               {{ batiments.type }}
             {% endfor %}
           </td>
        {% endfor %}
</tbody>

Hope It helps you.

Answer 2

try this (with @Gregsparrow suggestion):

$qb = $this-> $em->getRepository("YourBundle:Batiments")
                        ->createQueryBuilder('b');

// @Gregsparrows suggestion queryBuilder
$qb ->select("b")
    ->from("Batiments", "b")
    ->leftJoin(...")
    ->leftJoin("...");

$batiment = $qb->getResult();

return $this->render('...') ;

Does it matches?

Answer 3

Wrong

$batiment = $em->getRepository('MySpaceDatabaseBundle:Batiments');
$qb = $this->$em->createQueryBuilder(b);

Right

$qb = $em->getRepository('MySpaceDatabaseBundle:Batiments')->createQueryBuilder('b');

Answer 4

maybe you shouldtry something like this:

$batiments = $this->createQueryBuilder('b')
->join('b.ensembles', 'e')
->join('b.typesactivites', 'ta')
->addSelect('e')
->addSelect('ta')
->where('b.ensembles = :ensembles')
->andWhere('b.typesactivite= :typesactivite');

Try to remember that you use Doctrine, so the pivot table batiments_typesactivite does not exist in your symfony project, think in OOP and object relation.

---

UPADTE

does this match:

   $batiments = $this->createQueryBuilder('b')
    ->join('b.ensembles', 'e')
    ->join('b.typesactivites', 'ta')
    ->addSelect('e')
    ->addSelect('ta')
    ->where('b.ensembles = :ensembles')
    ->andWhere('b.typesactivite= :typesactivite');

$batiment = $query->getResult();

Answer 5

According to http://doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#many-to-many-unidirectional and http://doctrine-orm.readthedocs.org/en/latest/reference/association-mapping.html#many-to-many-bidirectional, what you need between your two entities is not an integer value, but a whole table. If I understand your model correctly, a "Batiment" can have multiple "Type d'activité", and vice-versa, thus you need a "BatimentTypeActivite" table in-between. The resulting tables would look something like this :

Batiment id name

Activte id name

BatimentActivite id_batiment id_activite

Answer 6

You should try this code, with fetch join in fact:

    $queryBatiments = $em->createQuery('SELECT b, ta, e
                                    FROM MySpaceDatabaseBundle:Batiments b
                                    JOIN b.typesactivite ta
                                    JOIN b.ensembles e
                                    WHERE b.ensembles = e.id');

    $batiment = $queryBatiments->getResult();

    return $this->render ('MySpaceGestionPatrimoinesBundle:Batiments:indexBatiments.html.twig', array ('batiment' => $batiment ));
}

According to the join argument in Doctine reference doc here, maybe you have to proceed your DQL request with a FETCH JOIN.

Does It matches with your problem?

Answer 7

Maybe IDENTITY will help you ... IDENTITY(b.typesactivite)

Edit

And alternative is something like that

Assuming $qb is your query builder instance

$qb->select("b")->from("Batiments", "b")
   ->leftJoin("Ensemble", "e", \Doctrine\ORM\Query\Expr\Join::WITH, "b.ensembles = e.id")
   ->leftJoin("Typesactivite", "ta",  \Doctrine\ORM\Query\Expr\Join::WITH, "b.typesactivite = ta.id");